You and I were both confused!
I think I figured out what he means though. When you call Sorenson VRS and ask for 911, they connect to a special service that has the LOCAL phone number for the emergency services. For example, if you call 911 in Boston, you get a different place than if you call 911 in Los Angeles - but if you were in Boston and you wanted to call 911 in Los Angeles, you would need to know the LOCAL Los Angeles center phone number, otherwise you would get the Boston center.
So I think what he means is that you should find the number for your local 911 center and put it into your quick dial on your VP. That way instead of calling Sorenson and having them find out how to connect to your local 911 center, you already get connected directly there.
However, I don't think this is a good idea. I am a Sorenson VRS interpreter, and we have a special set of rules for 911 calls. So it is better to dial "911" on your VP and we will get you connected. We stay on the phone with you until the police get to your location. So if you cannot dial 911 from a regular phone, dial 911 on your VP and the interpreter will help you.
We do need better 911 on VP but I don't think calling the local number yourself on your VP is a good idea. Either dial 911 on your regular phone if you have one, or dial 911 on Sorenson VRS.